| 1 | #!/bin/bash |
| 2 | # SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 3 | # SPDX-FileCopyrightText: 2020 EfficiOS Inc. |
| 4 | |
| 5 | set -eu |
| 6 | |
| 7 | outfile="${1:-}" |
| 8 | |
| 9 | if [ "$outfile" = "" ]; then |
| 10 | echo "Specify an output file as first argument, it will be overwritten." |
| 11 | exit 1 |
| 12 | fi |
| 13 | |
| 14 | # Generate a random string to use as an identifier |
| 15 | ident=$(tr -dc 'a-zA-Z0-9' < /dev/urandom | fold -w 8 | head -n1) |
| 16 | |
| 17 | cd ../.. || exit 1 |
| 18 | make syscalls_extractor |
| 19 | |
| 20 | sudo insmod ./src/lttng-wrapper.ko |
| 21 | sudo insmod ./src/lttng-syscalls-extractor.ko ident="$ident" || true |
| 22 | sudo rmmod lttng-wrapper |
| 23 | |
| 24 | cd - || exit 1 |
| 25 | |
| 26 | sudo dmesg | sed -n -e 's/\(\[.*\] \)\?'"$ident"'//p' > "$outfile" |
| 27 | |
| 28 | # Make sure we have both the start and end markers |
| 29 | if grep -q -- '---START---' "$outfile"; then |
| 30 | sed -i '/^---START---/d' "$outfile" |
| 31 | else |
| 32 | echo "Error: Start marker missing from dmesg output, your kernel log buffer is probably too small, set CONFIG_LOG_BUF_SHIFT to a bigger value." |
| 33 | exit 1 |
| 34 | fi |
| 35 | |
| 36 | if grep -q -- '---END---' "$outfile"; then |
| 37 | sed -i '/^---END---/d' "$outfile" |
| 38 | else |
| 39 | echo "Error: End marker missing from dmesg output, something went wrong." |
| 40 | exit 1 |
| 41 | fi |